There's Suicide Square from Sheffield, giant square for as many as you can fit

A1 Head ends of the room take their partner in a ballroom hold and gallop eight steps into the centre and back
A2 Side do the same
B1 Balance and swing your partner
B2 Men form and inner circle facing out, women form and outer circle facing in, every body circle left, then find a new partner

Best done with a large number of university students, to loud tunes with a great deal of vigour.
Finding a partner tends to be less than orderly and risky since the first part of the dance is a full on gallop.